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2) 5Y+15=57-2Y --> 5Y+2Y=57-15--> 7Y=42--> Y=42/7--> Y=6
3) 7Y-23=2Y+32 --> 7Y-2Y=32+23--> 5Y=55--> Y=55/5--> Y=11
4) 4Y/5-7=13 --> 4Y/-2=13-->4Y=13*-2--> 4Y=-26--> Y=-26/4
5) 9Y-12=24+3Y-->9Y-3Y=24-12--> 6Y=12--> Y=12/6--> Y=2